Controlling a 12V 2Pin Fan with arduino nano

Using Arduino General Electronics
1

I know that this question was already postet, but i have some extra questions. Here is a quick wiring diagram i made I think that would be ok:

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Fan specs:
Voltage: 12
Ampere: 0,26A
Watt: 3,12
Here is a quick link to the ones I own: https://www.amazon.de/anidees-Aureola-RGB-Fans-Group/dp/B08B1D5N27?th=1

My questions are now:

What transistor would I need? I already learned it in school, so, I will understand all your answers. I just could not figure out, how to find one that fits.

The second question is, I read elsewhere that controlling the fan might not work well if it doesn't have an extra PWM signal. Given this, I want to know if I can control the fan speed using different PWM signals through a transistor. The fan is typically a PC fan, which is usually controlled by varying voltages (12V, 10V, 8V).

And would i need a new Transistor for every fan or can I just hook up some on the same transistor?

2

IRLZ44 or STP16NF06L would be good.

But you MUST add a flyback diode. Any 1N400x would be suitable. Put it in parallel with the fan terminals, cathode to +12V

3

Not quite. The Arduino GND needs to connect to the MOSFET source

What transistor would I need?

Can you buy parts from Digi-key or Mouser?

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4

around the fan or?

And thanks for the quick response

5

Oh, yeah, i forgot the ground lol.
Sadly not. I buy 100% from amazon

But it would be possible to speed controll it or?

6

Yes using PWM

7

And isnt the transistor a bit overpowered? its marked for 55V

8

OK^^. The other guy posted 2 Transistors. Is the first one ok? because its marked for 55V

9

A lower voltage MOSFET may be more appropriate but the IRLZ44N is very common and you will have no problem finding it on Amazon.

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11

ok. Thank you guys. Helped me quite a lot

12

Have fun!

13

oh, that looks good. Only 220Ohms?

14

Thanks. Have a great (day?) xd

15

Will make the MOSFET turn on/off faster and for PWM it's bettor to be faster.

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16

Ah, i understand. Thank you

17

Ok, so i got a last quick question. Sorry to bother you again. would the IRLB8721 work too? because i have those at home

18

Yes it will

19

ok, thanks again xd

20

Just be careful. The metal tab is connected to the drain, so it will have 12V on it.

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